i figured out i wasnt cis in may and then started testosterone in march of so i spent a solid years with living as a guy although not always passable i started t months before my th birthday and im happier then i ever have been in my life i think if someone has known for a few years and is fairly certain they are trans is the bare minimum that someone should be allowed on cross sex hormones is definitely too young is still iffy but i can see a year old on hormones